Brixton Metals (TSX-V:BBB) has discovered a second copper-gold porphyry system this season at the Tempest target within its Thorn Project in northwestern British Columbia.
The Tempest porphyry target is located 2km southwest of the recently discovered Catalyst porphyry system along a northeast-southwest trending corridor that hosts multiple underexplored porphyry-style prospects, including the Camp Creek porphyry.
One hole has been drilled at Tempest during the 2025 season.
Assays from this hole confirm the presence of copper, gold, silver and molybdenum mineralization associated with porphyritic rocks exhibiting moderate to intense alteration and veining.
CEO Gary R Thompson says intersecting two mineralised porphyry systems with its first-ever drillhole at both Catalyst and Tempest “is a remarkable achievement and not something commonly seen in the industry”.
Thompson says these results underscore the “exceptional prospectivity” of the Camp Creek Corridor and reinforces Brixton’s belief that the Thorn Project has the potential to host a large, multi-centre mineralised system.
“The continuity of copper, gold, and silver mineralisation, combined with strong geophysical signatures and classic porphyry-style alteration, highlights the importance of this underexplored district,” the CEO adds.
The Thorn Project hosts a district-scale volcano-plutonic complex with several styles of mineralisation related to porphyry and epithermal environments.
In 2025, a single drillhole was completed to test the mineralisation concept at Tempest. The results confirmed the presence of mineralised porphyries containing copper, gold, silver, and molybdenum mineralisation.
At least two mineralised porphyries were identified – one fine-grained feldspar-rich porphyry at surface and one medium-grained dioritic porphyry at depth.
Brixton says these porphyries intrude fine-grained felsic volcaniclastic and intermediate volcaniclastic packages, as evidenced by cross-cutting relationships.
Notably, Cu-Au-Ag-Mo mineralisation occurs in well-defined intervals, especially in shallower sections. This pattern is interpreted as a result of wall-rock reactivity – mineralisation and alteration are less pronounced in non-reactive felsic volcanoclastic rocks, while intermediate rocks display moderate mineralisation and alteration when in contact with mineralised porphyries.
Alteration within the porphyritic rocks is characterized by a phyllic assemblage consisting of sericite, pyrite, and quartz, which locally overprints earlier potassic alteration.
Brixton says the results from the initial hole suggest the potential for a multiphase porphyry system.
Write to Adam Orlando at Mining.com.au
Images: Brixton
